Machine for packing zigzag interfolded paper leaves in cardboard covers



June 22, 1937.

F. LERNER MACHINE FOR PACKING ZI GZAG INTERFOLDED PAPER LEAVES IN CARDBOARD COVERS 7 SheetsSh eet 1 June 22, 1937.

F. LERNER 2,084,533 MACHI NE FOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES IN CARDBOARD COVERS FiledJ une 2, 1936 '7 sheets-Sheet 2 1 19.2. 4? 42 4j4 ,;5v 3 40 June 22, 1937. F, E NE 2,084,533

MACHINE FOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES IN CARDBOARD COVERS Filed June 2, 1936 7 Sheets-Sheet 3 Fig. 4..

June 22, 1937. F. LERNER 2,084,533

MACHINE FOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES .[N CARDBOARD COVERS Filed June 2, 1936 7 Sheets-Sheet 4 Fig. 10.

' Yrs-3 111 111 t i II II IIII/ June 22, 1937. F. LERNER 2,084,533

MACHINE TOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES IN CARDBOARD COVERS Filed June 2, 1936 7 Sheets-Sheet 5 June 22, F. LERNER MACHINE FOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES 'IN CARDBOARD CWERS Filed June. 2; 1936 7 Sheets-Sheet 6 5 Fig 20.

A June 22, 1931.

F. LERNQER 2,084,533

MACHINE FOR PACKING ZIGZAG INTERFOLDED PAPER LEAVES IN CARDBOARD COVERS Filed June 2, 1936 '7 Sheets-Shet' 7 19- I Fig.25.

m ki/( 107 Fig. 2 6.

TORWEZY Patented June 22, 1937 PATENT OFFICE MACHINE FOR PACKING ZIGZAG INTER- FOLDED PAPER LEAVES IN CARDBOARD COVERS Friedrich Lemar, Vienna, Austria Application June 2, 1936, Serial No. 83,148

. In Austria February 5, 1936 9 Claims. (01. 93- 3) In my Austrian patent specification No. 142,980 and British patent specification No. 438,573 corresponding thereto there is described a machine for packing-zig-zag interfolded paper leaves in 5 cardboard covers, the machine comprising a conveyor device adapted to be moved step by step,

a series of devices on the conveyor for holding the packs of papers and means for folding the covers about the packs 'in stages and for withl drawing the end of one paper leaf through a slot in the cover and for effecting a final closing of the cover by sticking with an adhesive.

The present invention which furnishes improvements for developments of such machines 15 is intended to enable thecovers to be closed and fastened either with or without an adhesive. In addition, the improvements permit an exact shaping of the package and a reliable construction of the separate appliances with respect to their ac- 20 tion and certainty of operation.

The optionalproduction of carton envelopes to be fastened without adhesive on the machine is made possible according to the invention by the provision of a supplementary folding device 25 for inserting the longitudinal side flap of the carton envelope for'the purpose fastening the package while supported on the intermittently operated conveyor means which device forms part of the machine.

30 Furthermore, according to the invention, an exact shaping of the carton envelope is attained by a die for bending up the four narrow sides bordering on the slotted wall consisting of three telescopically arranged tools acting step by step,

, which 'on moving down towards a controlled counterde with curved working surface, first clamps the slotted wall and then sharply forms the low-er and upper edges of the narrow sides.

The controlled folding members which bend 40 over the short end flaps into the interior of the carton envelope act, according to this invention, against a controlled cover plate in order to en sure a perfect bending over of the end flaps.

To'avoid any faults when drawing the first paper leaf through the slot in the carton envelope,

there is provided on the suction mouthpiece employed for this purpose a resiliently supported pressing-on strip which operates in advance of the mouthpiece.

50 In order to improve the formation of the edges in .the enclosed package, the closed packages are subsequently shaped in guide conduit by means of two dies with curved'working surfaces operating perpendicularly to one another.

' For a full understanding of the invention a detailed description of a-machine embodying all the features of the same in their preferred form will now be given in connection with the accompanying diagrammatic drawings, forming a part of this specification, and the features forming the invention will then be specifically pointed out in the claims. 4 a

In the diagrammatic drawings, Fig. 1 is a fragmentary plan view of the improved machine for packing zig-zag interfolded paper leaves in cardboard covers;

Fig. 2 is a fragmentary front view,

Fig. 3 is a fragmentary side view seen from the left side in Fig. 1.

Figs. 4 and 5 represent the mechanisms for the supply of the carton blanks to the conveyor, and

the dies engaging the supplied blanks, in front elevation and in side view respectively.

Fig. 6 shows the carton blank.

, Figs. 7 and 8 show diagrammatically the dies in two stages of operation.

Fig. 9 represents a perspective view of the cardboard cover partly shaped by the dies and prepared for the insertion of a pack of leaves.

. Fig. 10 is a side view, and Fig. 11 is a front view of the'improved carton folding device.

Figs. 12, 13, 14, and 15 show details of the carton folding device diagrammatically on a larger scale.

Fig. 16 is a side view and Fig. 17 is a frontview of the improved suction drive for pulling the first paper leaf through the slot in the wall of the cardboard cover.

Fig. 18 shows the suction nozzle on a larger scale.

Fig. 19 is a side view.

Fig. 20 is a front view of the supplementary folding device for inserting the longitudinal side flap of the carton envelope.

Figs. 21, 22, 23 represent diagrammatically the movements of the supplementary folding device elements, and Fig. 24 shows the operation in perspective view.

Figs. .25, '26, and 27 the construction of the improved dies for shaping the closed carton envelope are shown. diagrammatically in a sequence of operations.

Fig. 28 shows a plan view of the dies, and in Fig. 29 a cross-section through the finished package is represented.

Referring to the accompanying drawings, and. more particularly to Figs. 1, 2, and 3, the bedplate of the machine is indicated by numeral 35.

On the underside of the bedplate 35 is mounted in bearings the main shaft 36, driven from any suitable source of power. A parallel shaft 36a is connected through gears 31, 31a with the main shaft 36, and bears a sprocket 38 and a bevelled gear 39 which are keyed on the rear end of the shaft 36a.

.A chain 38a engaging the Sprocket 38 and passing over a sprocket 38b on a spindle 4 I, drives this latter and also in turn a series of spindles 4Ia, 4Ib,' 4Ic, Md, and Me, located on the upper surface of the bedplate 35, and interconnected by pairs of bevelled gears mounted on the ends of said spindles. The bevel gear 39 on the shaft 36a meshes with a bevelled gear 39a keyed on a vertical shaft 42 on the top end of which a crank disc 43 is mounted effecting through a crankdriving mechanism an oscillating movement of a lever 44 and of a pawl 45 pivoted on the end of said lever 44. The pawl 45 is spring pressed against the inner circumference of a fiat annular conveyor 48, ro-tatably supported by brackets 32, 32a, and 32b. On the inner circumference of the annular conveyor 40 a plurality of uniformly spaced projecting teeth 34 (of which only one is shown in Fig. 1) is provided and so shaped that the angular part of the pawl 45 engages the teeth 34 and effects the step by step rotation of the annular conveyor-disc 40 in an anticlockwise direction (in Fig. 1).

On the outer side of the annular conveyor 40 a series of equidistantly spaced holders 24 are mounted, and by, the step by step rotary movement of the annular conveyor 48 are brought successively into engagement with a series of oper ating devices, diagrammatically indicated in Fig.

1 by.rectangles,46, 41, 48, 49, 50, and 5I', as symbols for the carton blank supplying and drawing device (48), for the paper leaves inserting means or stage (41), for the improved folding mechanism (48), for the improved suction device for pulling the first paper leaf through the slot in the carton envelope (49), for the supplementary folding device inserting the longitudinal side flap of the carton envelope and fastening the package without pasting (5H), and for the final stage for shaping the packets by dies (5i).

The carton envelope to be fastened without adhesive (shown in Fig. 6) has two lateral end flaps I, 2 on the wall I3 of the envelope blank. The lateral end flaps I, 2 are folded inwards with the side I3 on the packet inverted, and simultaneously the longitudinal side flap 6 is inserted in the gap between the side I3 and the end flaps I, 2 by the action-of the supplementary folding device in a manner illustrated in Fig. 24 in a perspective view.

The operative elements of the supplementary folding device (shown in Figs. 19-23) are controlled folding plates I4, I5, of which the folding plate I4 having a foot I8 is carried in a vertical folding plate guide mounted on a horizontally reciprocated rod I6. ,The folding plate I4 is lifted by a spring so as to engage a stationary ramp II causing the vertical movement of the plate I4 while it is carried horizontally by the reciprocated rod I6. The I5 is fixedly mounted on a rod I 8 sliding horizontally in bearings 53, 53a carried on a forked yoke 52 movable up and down in a vertical guide 53b. As a result of the simultaneous movements in the horizontal and in the vertical planes, the operating end of the plate I5 (Fig. 19) follows a curved path 54 indicated in dotted lines in Fig. 21.

After having the carton body shaped at the first operating station 48, the carton moves to the next station 41 where the packs of paper leaves ly overlie the container part and the adjacent side wall I3 respectively while folding devices I II and I I2, also hereinafter described, act upon the end flaps I, 2, 4, and 5 and the longitudinal side flap 6, turning them upwardly and inwardly about the edges of the cover plates. When the cover plates recede from the carton, the plate 25 by reason of its curved lips, is enabled to ride over the inturned flaps I and I2 thereby ironing them in effect against the side wall I 3.

On moving to the next following operating station 49, the carton is engaged from the underside by a suction nozzle 28 having a resiliently supported pressing on strip 29, this device serving to prevent deformation of the slotted side of the carton while the outermost sheet is drawn by the suction device through the slot in the carton wall. During the course of its movement from this to the next succeeding station 50, the carton is acted upon by a stationary curved guide plate (not shown in the drawings) in the nature of a ramp which latter lifts the parts I3, I2 and I from a horizontal to a substantially vertical position as shown in Fig. 21 during the rotative movement of the conveyor 48. On the completion of this action, the carton now located in the next operating station is acted upon by controlled folding plates I l and I5 which coact in closing the carton as illustrateddn Figs. 21, 22, and 23. In the course of this operation, the controlled folding plate I5 moves to the left on its upper track denoted in Fig. 21, thereby pressing the-flaps I and 2 towards the wall I3. Immediately following both the plates I4 and I5 move to the left causing the side wall I 3 to be folded down towards the container. In the course of this motion, the folder plate I5 drops to a lower level and advances to the ,left again thereby engaging the longitudinal side flap 6 and tucking it into the pockets created between the Wall I3 and the end flaps I and 2.

The forward movement of .the plate I5 on the rod I9 (to the right in Fig. 19) is effected through a bell crank lever 55, by means of a cam 55,

mounted on the shaft 4Id (Figs. 19 and 20) and co-operating with a roller 51 on the lever 55, and the rearward movement of the plate I5, is effected by a spring 58 (see Fig. 19). The corresponding horizontal motion of the plate I4 in the opposite direction is obtained from a bell crank lever a, and a cam 64 which latter is also on the shaft 4| d, and the return movement of the plate I4 is brought about by the action of a. spring 6519.

The yoke 52 with the bearings 53, 53a is supported by a roller 59 on the end of a lever 88, and is lifted by a cam BI engaging a roller 62 on the other end of the lever 60, the return movement of the yoke 52 being effected by the action of springs 63, 63a.

, .It is important for the perfect and reliable fastening of the packets without adhesive that the cardboard envelope should be carefully and exactly shaped. For this purpose the improved machine includes, at the next operating station 5I means for positively gripping and firmly supporting the cardboard blanks while they are shaped in the holders 24 of the annular conveyor 40. The improved means comprise three telescopically arranged tools 28, 2I, "(shown in Figs. 4, 5,

'7, and 8), co-operating with a counter-die 23 and the carton holder 24.

I The cardboard envelopes are transferred "one by one from a magazine by means of an oscillating suction nozzle 61, and placed in exact position relatively to the holder mould 24. The counter-die 23 (Fig. 5) penetrates into the hollow mould 24 till the curved working-surface of the die 23 engages the'slotted side 3 of the blank, firmly supporting the same when the telescopically arranged tools of the upper die come consecutively into action during their operativemovement, the tool 20 first clamping the side wall 3 of the blank on the counter-die 23, till the working edges of the tool 2| come incontact with the blank on the counter-die 23, whereafter dies and in elongated holes formed in the tool -2l, which' in turn is similarly connected with the tool 22 (the screws are not shown in the drawings), and the dies are kept resiliently at the relative distances by coiled compression springs. The tool 22 is mounted fixedly on a vertical reciprocatable shaft 68 slidably guided in-a bearing 69 on a supporting frame 10. The shaft 68 is lifted by the action of a lever 12 engaging a stud 1| affixed to the shaft 98, the lever being operated in one direction by acam 13 on the spindle 4| and in the other direction by a return spring 14.

The counter-die 23 is mounted on avertical rod 15 guided in a bearing 16 coaxial with the shaft 68. The rod 15 is rested on a roller 11 on the end of a lever 18 oscillating'on a stud 19 fixed in the frame 10, the oscillating movement of the lever 18 being imparted by the action of a cam on the spindle 4| and by a return spring 80a.

In a subsequent operating stage a packet of paper leaves .is inserted in the carton envelope shaped in box form (shown in Fig. 9), and the carton is then passed to folding memmrs described in the parent patent, said members folding over the short side flaps 4, 5, 6 and the end flaps l, 2 (Fig. 9).

To improve the action of the folding members there are allocated to them cover plates 25, 26 (Figs. 14 and 15). The cover plates 25, 26 are mounted on a rod 21 (Figs. 10, 11) reciprocatable in a bearing 8|, which is in turn reciprocatable vertically in guides attached 'to a bracket 82 fastened on the' machine table. The horizontal movement of the rod 21 is controlled by a cam 83 mounted on the spindle 41b through a roller on a crank bell lever 83a and a return spring, and the vertical movement of the bearing 8| is brought about by a cam 84 through a lever 84a and a return spring (the springs are omitted in Figs. 10 and 11 for sake of clearness). As soon as the pack of papers inserted in the cardboard envelope shaped inbox form is delivered into the folding position (indicated by numeral 48 in Fig.

* 1), the cover plates 25, 26 are lowered on to the paper packet and exert-a counterpressure while the end flaps I, 2, 4, and 5 are being turned up and inward by the folding members, thus making it possible to shape properly the bent edges and to reduce the-tension of the material at the edges. After turning over the end flaps, the rod 21 with the cover plates 25, 26 is moved horizontally back,

whereby the bent up curved parts of the plate 25 iron down fiat the end flaps I, 2 of the envelope and prevent them from springing up prematurely.

On the further movement of the holder 24 on the annular conveyor 40, the paper packet in the envelope with its end flaps I, 2 partly covering the packet, is passed to the operative stage 49 (Fig. 1) where a suction mouthpiece 28 engages the papers through the slot or window in the side wall 3 of the envelope and during its movement downwards pulls the end of the first leaf through the slot. In order to make the envelope more secure on the drawing of the paper leaf through the slot, the suction mouthpiece in this improved construction has connected to it a pressing-on strip 29 (Figs. 18, 16, 17) which operates in advance of the mouthpiece, being mounted to slide in a guide thereon and supported resiliently by a spring 85 whereby it presses firmly against the edge of the slot in the envelope before the suction mouthpiece 28 comes into the working position so that only the outermost leaf which is engaged directly by the suction mouthpiece can be drawn out, the edge of the slot being held by the pressing-on strip 29 and thus protected against injury and deformation.

The suction mouthpiece 28 is connected to 'a pipe 86 (Figs. 16 and 17) communicating with a vacuum device not shown in the drawings. The pipe-8'6 is held in a lever 81 pivoted on a stud 88 adjustably secured ina frame structure 89 mounted on the machine table. The lever 81 is oscillated in one direction by the action of a cam 90 mounted on the spindle Me and engaging a roller 9| on the lever 81, and in the other direction by means of a return spring 92.

Mounted on the spindle Me is a sprocket 93 driving a chain 94 passed over sprockets 93a, 93b, 930. The sprocket 93b is mounted fixedly on a spindle 95b supported in bearings 98 on a bracket fastened to a frame 99 fixedly mounted on the machine table. The spindle 95b carries a roller 96a rotating partly in a paste container 96 and transferring paste from the container 96 to a member 96a'operated when the blanks are to-be fastened by pasting. The paste supplying member 96a is moved so as to take paste from the container 96 and transfer it to the wall 13 and the flap 6 of the blanks, by means of a crank lever 91 linked to a crank I90 mounted on the sprocket 93a. The pasting device can be easily disconnected and set out of work when it is not to ,be operated, by means of a clutch pin provided on a sleeve and arranged to lock and unlock the sprocket 93. These clutch parts are of wellknown construction and are not shown in the drawings.

In a subsequent stage of operation the cardboard envelope is fastened in the supplemental folding device as already described and illustrated-in Figs. 19 to 24. The packet is then transferred in a subsequent operating stage on to a guide trough arranged above. the intermittently rotated annular conveyor 40, whereby the process of "packing the papers in the cartons is .which by long duration and distribution over the surfaces of the packet enclosed all around,

effects a clearly defined and permanent edge formation, as is shown in Fig. 29 in a cross section of the finished packet.

The transfer of the packets from the holder 24 on the annular conveyor 40 and the lifting of the same to the guide trough N15 is effected by means of two aligned and vertically reciprocatable pistons and I02. During the upward movement of the piston IOI, the co-operating piston I02 also in contact with the packet exerts a pressure on the packet which is thus clamped between the co-operating pistons while it is moved upwards .(Fig. 25), through a recess in a supporting plate HM to the guide trough M5. The flap 7 of the carton comes in engagement with the curved surface in the recess I03 and is turned down and around the packet while the packet is lifted to the guide trough me. As the pistons IDI and 02 recede, a horizontally reciprocatable pusher l0! shifts the packet transversely into the guide trough I (Fig. 26), whereby the flap 1 is turned horizontally as shown in Fig. 26. A horizontally reciprocating pusher me moving longitudinally of the guide trough I95, advances the packet'along the trough to the shaping dies 30, 3|, (Fig 28) which produce the exactly shaped corners and thus complete the packets. The following packets push the preceding packets along the trough N15 to a magazine or to a delivery pile suitably located relativelyto the outlet of the guide trough 15..

I claim:-

1. A machine for packing zig-zag interfolded paper leaves in cardboard cartons comprising an intermittently moving conveyor, a series of carton holding devices arranged at spaced intervals upon said conveyor, means for feeding carton blanks to said holders, means for shaping packs of paper leaves, means for folding the blanks about packs of interfolded papers inserted therein .and means for tucking supplementary side flaps into pockets formed in the course of folding the carton to thereby secure the packet in a closed condition without need for adhesive.

2. A machine for paclfing zig-zag interfolded paper leaves in slitted cardboard cartons comprising an intermittently moving conveyor, a series of carton holding and shaping devices arranged at spaced intervals upon said conveyor, means for feeding carton blanks to the holding devices, means for shaping the blanks to carton form, means for folding the blanks about packs of interfolded leaves inserted therein and means for tucking a supplementary side fiapinto.

pockets formed in the course of folding the carton to thereby hold the packet in a. closed condition without need for adhesive, and means for withdrawing the end of one paper leaf through the slot in the packet.

3. A machine for packingzig-zag interfolded paper leaves in cardboard cartons-comprising an intermittently moving conveyor, 2. series of carton hoLiing and shaping devices arranged at spaced intervals thereon, means for feeding slotted carton blanks to said holders, a die for folding up the four narrow sides bordering'the slotted wall of the blank consisting of three telescopically arranged tools which operate in succession against a counterdie, means folding the remainder of the carton about packs of inter- 75 folded papers inserted therein and tucking a supthe blanks to carton form adapted to receive plementary flap into pockets formed during the folding thereby serving without adhesive to hold the packet in a closed condition, and means for withdrawing the end of one of said leaves through the slot in the wall of the packet.

4. A machine for packing zig-zag interfolded paper leaves in cartons comprising an intermittently moving conveyor 2, series of regularly spaced carton holding devices arranged on said conveyor, means for feeding carton blanks to said holders, means for shaping to carton form the blanks engaged with the holders, means for folding the remainder of the carton about a pack of interfolded'papers inserted therein, said means including a two-part covering plate of which one part is provided with bent up curved parts which iron over the folded, end flaps and prevent same springing up, and means for tucking in a supplementary flap into pockets formed during the folding operation thereby serving without the need of adhesive for securing thepacket in a closed condition.

5. A machine for packing zig-zag interfolded paper leaves in a carton-comprising an intermittently moving conveyor, a series of blank holding and shaping devices arranged thereon at equally spaced intervals, means for feeding carton blanks to said holding devices, means for folding the blanks into carton form and about packs of interfolded papers inserted therein and tucking a side flap into pockets formed during the folding operation, and means for withdrawing the end of one of said leaves through a slot in the carton wall said means comprising a suction mouthpiece with a resiliently supported pressing on strip acting in advance of the mouthpiece. I

6. A machine for packing zi'g-zag interfolded paper leaves comprising an intermittently moving conveyor, a series of blank holding and shaping devices, arranged thereon at equally spaced intervals, means for feeding carton blanks to said holding devices, means for folding the blanks into carton form and about packs of interfolded papers inserted therein, means for tucking a side means comprising a suction mouthpiece with a resiliently supported pressing on strip acting in advance of the mouthpiece, and means for shaping the closed packet comprisingtwo pressing dies with curved working surfaces operating" per pendicularly one to another.

7. In a mechanism for folding paper cartons containing paper leaves and locking said cartons in folded condition, a support for the partially unfolded carton, a vertically disposed coverclosing element movable forwardly over the carton and then downwardly and forwardly, a horizontally disposed tucking element movable in a closed path toward and from the vertical element, means for moving the first named element transversely over the carton to partially bend over the cover thereof, means for simultaneously moving the second named element in an upper horizontal plane toward the first element, retracting the second element and again moving it forward ona lower plane to tuck a locking flap into the carton and retracting the second element while the first named element is moving downward and forward to iron down the cover flap of the carton.

8. In a mechanism for folding paper cartons containing paper leaves and locking the said cartons in folded position, a support for the partially unfolded carton, a vertically disposed cover closing plate' having its lower end curved downward and then rearward, the plate being movable forwardly over the carton and then downwardly and forwardly, a horizontally disposed tucking plate movable in a closed path toward and from the vertical plate, means for moving the vertical plate transversely .over the carton to partially bend over the cover thereof, means for simultaneously moving the horizontal plate in an upper horizontal plane toward the first element to bend in two end flaps on the carton cover, retracting the horizontally movable plate and again moving it forward on a lower plane to engage and tuck in a locking flap between the inwardly turned end flaps and the cover and then retracting the second named plate while the first plate is moving downwardly and forwardly to thereby iron down the cover flap oi the carton.

9. In a mechanism for folding paper cartons containing paper leaves, which cartons include a top panel and a slitted bottom panel, the top panel having end flaps and a marginal covering flap, the slitted panel having a marginal longitudinal locking flap; means for supporting an unfolded carton with the inner face of the slittcd panel upward and with its top panel and marginal flap extending upward and with the end flaps bending inward, means movable toward and against the outer face of the top panel to force it downward, a second means simultaneously movable in an upper plane toward the inner lace of the top panel to force the end flaps of the top panel partly inward and movable inward on a lower plane to 'force the locking flap inward between the end flaps of the top panel and the body of the bottom panel, and'means moving the first named means downward and toward the margin of the covering flap to iron said flaps and folds into a closed position.

. I FRIEDRICH IERNER. 

